Back glass



FIG. 1 is a back view of a back glass.

FIG. 2 is a bottom view of the back glass of FIG. 1.

FIG. 3 is a front view of the back glass of FIG. 1.

FIG. 4 is an isometric view of the back glass of FIG. 1.

FIG. 5 is a left-side view of the back glass of FIG. 1.

FIG. 6 is a right-side view of the back glass of FIG. 1; and,

FIG. 7 is a top view of the back glass of FIG. 1.

The items shown with broken lines form no part of the claimed design. 

CLAIM The ornamental design for a back glass, as shown and described. 